2020
DOI: 10.1021/acs.inorgchem.9b03726
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In Situ High-Temperature Synchrotron Diffraction Studies of (Fe,Cr,Al)3O4 Spinels

Abstract: The modeling of a loss-of-coolant-accident scenario involving nuclear fuels with FeCrAl cladding materials in consideration to replace a Zircaloy requires knowledge of the thermodynamics of oxidized structures. At temperatures higher than 1500 °C, oxidation of FeCrAl alloys forms (Fe,Cr,Al)3O4 spinels. In situ high-energy X-ray diffraction in a conical nozzle levitator installed at beamline 6-ID-D of the APS was used to study the structural evolution of the oxides as a function of the temperature. Single-phase… Show more

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Cited by 7 publications
(4 citation statements)
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“…At those temperatures, there is a mixture of H- and X-type phases, and the H-type phase is richer in smaller REs than the X-type phase. Such deviation from linearity for lattice parameter values at phase-transition temperatures is a common phenomenon. The X-type phase was observed in only two diffraction patterns, and its lattice parameter increased from 4.37397 Å at ∼2300 °C to 4.3807 Å at ∼2350 °C.…”
Section: Results and Discussionmentioning
confidence: 99%
“…At those temperatures, there is a mixture of H- and X-type phases, and the H-type phase is richer in smaller REs than the X-type phase. Such deviation from linearity for lattice parameter values at phase-transition temperatures is a common phenomenon. The X-type phase was observed in only two diffraction patterns, and its lattice parameter increased from 4.37397 Å at ∼2300 °C to 4.3807 Å at ∼2350 °C.…”
Section: Results and Discussionmentioning
confidence: 99%
“…One strategy to perform these measurements is to use a containerless sample environment. Aerodynamic levitation and laser heating have been previously used to perform high‐temperature neutron and XRD on high‐entropy oxides 24,41,43–47 …”
Section: Resultsmentioning
confidence: 99%
“…Aerodynamic levitation and laser heating have been previously used to perform high-temperature neutron and XRD on high-entropy oxides. 24,41,[43][44][45][46][47]…”
Section: Structural Analysis Via High-temperature Powder Xrdmentioning
confidence: 99%
“…Quantitative phase analysis of powder X-ray diffraction (PXRD) data collected in situ, as a reaction occurs, is increasingly being used to evaluate how the abundance of reagent, intermediate and product phases evolve and to gain insight into the reaction kinetics and mechanism. By comparing how a reaction evolves at different temperatures, with different chemical precursors and for different stoichiometries, we can develop an understanding of what governs reaction progress (Agca et al, 2020;Chen et al, 2011;Wu et al, 2015) so that, ultimately, we can design reactions that deliver new target materials with optimal yield, purity and cost (Wicker & Walker, 2013;Martinolich et al, 2016;Todd et al, 2020;Shoemaker et al, 2014).…”
Section: Introductionmentioning
confidence: 99%